Windows 10 1 of 2 SSDs read slows down after windows fully boot. Please help, thank you!

  • Thread starter Thread starter Sea Bass
  • Start date Start date
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Sea Bass

I have encountered a weird problem.
System Spec:
Windows 10
Intel I9-9980 HK
16 GB Ram
RTX 2080 16GB MAX-Q
ADATA SX8200PNP 2TB SSD
KXG50PNV2T04 2TB SSD

Two M.2 SSDs, A is the boot drive, has no problems at all, about 2800 MB/s read.
B is the other nonboot drive, when windows first start, within the first few seconds, CrystalDiskMark shows normal read speed, about 2700 MB/s. Then if I wait a minute or so, test it again, read speed max out at 200-400 MB/s. In task manager, it shows near 100% active time. Write is about 500 MB/s.
BIOS is set on ACHI mode. Options are either ACHI or Raid.
Both SSDs have a Read speed rating of around 2.8 GB/s. TLC memory.

Please help, thank you!

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